> For the complete documentation index, see [llms.txt](https://docs.filecoin.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.filecoin.io/reference/general/legacy-content.md).

# Legacy Content

{% hint style="warning" %}
The content on this page describes tools, workflows, and projects that are **no longer actively maintained**. It is preserved for historical reference only.

For current guidance, see [Upload to Filecoin](/getting-started/how-storage-works/upload-to-filecoin.md), [PDP](/provide-storage/pdp.md), or [Build on Filecoin](/build-on-filecoin/getting-started.md).
{% endhint %}

## Smart contracts

### RaaS (Renew, Repair, Replicate as a Service)

RaaS was a smart-contract-based approach to automating storage deal renewal, repair, and replication on Filecoin. It supported both self-hosted and aggregator-hosted (via Lighthouse) architectures.

**Key resources:**

* [RaaS Starter Kit](https://github.com/filecoin-project/raas-starter-kit)
* [Lighthouse documentation](https://docs.lighthouse.storage/)

### Aggregated deal-making

A workflow for bundling many small data pieces into larger Filecoin deals using data aggregation and Proof of Data Segment Inclusion (PoDSI).

**Key resources:**

* [FRC-0058 — Proof of Data Segment Inclusion](https://github.com/filecoin-project/FIPs/blob/master/FRCs/frc-0058.md#proof-of-data-segment-inclusion)
* [Data segment specs discussion](https://github.com/filecoin-project/FIPs/discussions/512)
* [Filecoin Data Tools](https://github.com/application-research/fevm-data-segment)

### Cross-Chain Data Bridge (CCDB)

CCDB enabled EVM-compatible chains (Avalanche, Base, etc.) to initiate Filecoin storage deals via cross-chain messaging through Axelar.

**Key resources:**

* [onramp-contracts](https://github.com/FIL-Builders/onramp-contracts/)
* [xChainClient](https://github.com/FIL-Builders/xchainClient)
* [dataBridgeDemo](https://github.com/FIL-Builders/dataBridgeDemo)
* [Architecture deep-dive (Medium)](https://medium.com/@filoz/under-the-hood-architecture-and-prototype-of-cross-chain-data-storage-6f8ba2c480d6)

### Client contract tutorial

A tutorial on creating storage deals programmatically via FVM smart contracts using the deal-making starter kit.

**Key resources:**

* [FVM deal-making kit](https://github.com/filecoin-project/fvm-starter-kit-deal-making)
* [ETHGlobal walkthrough (YouTube)](https://www.youtube.com/watch?v=27EV3gQGY9k)

### Chain data query

A tutorial on querying Filecoin chain data from a dApp using ethers.js against a public Glif JSON-RPC endpoint. For current chain access, use the [Mainnet RPCs](/networks-and-tools/networks/mainnet/rpcs.md) or [Calibration RPCs](/networks-and-tools/networks/calibration/rpcs.md) and the [FEVM indexers](/build-on-filecoin/advanced/fevm-indexers.md) guidance.

## Projects

### Saturn

Saturn was a Web3 CDN in the Filecoin retrieval market, enabling fast content delivery from Filecoin storage providers. The project is no longer active.

For current retrieval guidance, see [Basic retrieval](/getting-started/how-retrieval-works/basic-retrieval.md) and [Serving retrievals](/getting-started/how-retrieval-works/serving-retrievals.md).

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